docs: def katex_rendering_delimiters(app):
      """Delimiters for rendering KaTeX math.
  
      If no delimiters are specified in katex_options, add the
      katex_inline and katex_display delimiters. See also
      https://khan.github.io/KaTeX/docs/autorender.html
      """
      # Return if we have user defined rendering delimiters
      if 'delimiters' in app.config.katex_options:
          return ''
      katex_inline = [d.replace('\\', '\\\\') for d in app.config.katex_inline]
      katex_display = [d.replace('\\', '\\\\') for d in app.config.katex_display]
      katex_delimiters = {'inline': katex_inline, 'display': katex_display}
      # Set chosen delimiters for the auto-rendering options of KaTeX
      delimiters = r'''delimiters: [
          {{ left: "{inline[0]}", right: "{inline[1]}", display: false }},
          {{ left: "{display[0]}", right: "{display[1]}", display: true }}
          ]'''.format(**katex_delimiters)
      return delimiters